audit-login-failed-event-class.md

title	Audit Login Failed Event Class
description	Audit Login Failed Event Class
author	WilliamDAssafMSFT
ms.author	wiassaf
ms.date	03/14/2017
ms.service	sql
ms.subservice	supportability
ms.topic	reference
helpviewer_keywords	Audit Login Failed event class
monikerRange	=azuresqldb-current||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

Audit Login Failed Event Class

[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance] The Audit Login Failed event class indicates that a user tried to log in to [!INCLUDEmsCoName] [!INCLUDEssNoVersion] and failed. Events in this class are fired by new connections or by connections that are reused from a connection pool.

Audit Login Failed Event Class Data Columns

Data column name	Data type	Description	Column ID	Filterable
ApplicationName	nvarchar	Name of the client application that created the connection to an instance of [!INCLUDEssNoVersion]. This column is populated with the values passed by the application rather than the displayed name of the program.	10	Yes
ClientProcessID	int	ID assigned by the host computer to the process where the client application is running. This data column is populated if the client process ID is provided by the client.	9	Yes
DatabaseID	int	ID of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. [!INCLUDEssSqlProfiler] displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function.	3	Yes
DatabaseName	nvarchar	Name of the database in which the user statement is running.	35	Yes
Error	int	Error number of a given event. Often this is the error number stored in the sys.messages catalog view.	31	Yes
EventClass	int	Type of event = 20.	27	No
EventSequence	int	The sequence of a given event within the request.	51	No
HostName	nvarchar	Name of the computer on which the client is running. This data column is populated if the host name is provided by the client. To determine the host name, use the HOST_NAME function.	8	Yes
IsSystem	int	Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user.	60	Yes
LoginName	nvarchar	Name of the login of the user (either [!INCLUDEssNoVersion] security login or the Windows login credentials in the form of DOMAIN\username).	11	Yes
NTDomainName	nvarchar	Windows domain to which the user belongs.	7	Yes
NTUserName	nvarchar	Windows user name.	6	Yes
RequestID	int	The ID of the request containing the statement.	49	Yes
ServerName	nvarchar	Name of the instance of [!INCLUDEssNoVersion] being traced.	26	No
SessionLoginName	nvarchar	Login name of the user who originated the session. For example, if you connect to [!INCLUDEssNoVersion] using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both [!INCLUDEssNoVersion] and Windows logins.	64	Yes
SPID	int	ID of the session on which the event occurred.	12	Yes
StartTime	datetime	Time at which the event started, if available.	14	Yes
Success	int	1 = success. 0 = failure. This event will always show failure.	23	Yes
TextData	ntext	Text value dependent on the event class captured in the trace.	1	Yes

See Also

Extended Events
sp_trace_setevent (Transact-SQL)